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101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/* Inline functions for dynamic linking.
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Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <elf.h>
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#include <dl-machine.h>
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#include <assert.h>
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/* Read the dynamic section at DYN and fill in INFO with indices DT_*. */
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static inline void __attribute__ ((unused))
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elf_get_dynamic_info (ElfW(Dyn) *dyn,
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ElfW(Dyn) *info[DT_NUM + DT_PROCNUM + DT_EXTRANUM])
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{
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unsigned int i;
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for (i = 0; i < DT_NUM + DT_PROCNUM + DT_EXTRANUM; ++i)
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info[i] = NULL;
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if (! dyn)
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return;
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while (dyn->d_tag != DT_NULL)
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{
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if (dyn->d_tag < DT_NUM)
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info[dyn->d_tag] = dyn;
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else if (dyn->d_tag >= DT_LOPROC &&
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dyn->d_tag < DT_LOPROC + DT_PROCNUM)
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info[dyn->d_tag - DT_LOPROC + DT_NUM] = dyn;
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else if ((Elf32_Word) DT_EXTRATAGIDX (dyn->d_tag) < DT_EXTRANUM)
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info[DT_EXTRATAGIDX (dyn->d_tag) + DT_NUM + DT_PROCNUM] = dyn;
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else
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assert (! "bad dynamic tag");
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dyn++;
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}
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if (info[DT_RELA])
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assert (info[DT_RELAENT]->d_un.d_val == sizeof (ElfW(Rela)));
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if (info[DT_REL])
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assert (info[DT_RELENT]->d_un.d_val == sizeof (ElfW(Rel)));
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if (info[DT_PLTREL])
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assert (info[DT_PLTREL]->d_un.d_val == DT_REL ||
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info[DT_PLTREL]->d_un.d_val == DT_RELA);
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}
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#ifdef RESOLVE
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/* Get the definitions of `elf_dynamic_do_rel' and `elf_dynamic_do_rela'.
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These functions are almost identical, so we use cpp magic to avoid
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duplicating their code. It cannot be done in a more general function
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because we must be able to completely inline. */
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#if ! ELF_MACHINE_NO_REL
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#include "do-rel.h"
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#define ELF_DYNAMIC_DO_REL(map, lazy) \
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if ((map)->l_info[DT_REL]) \
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elf_dynamic_do_rel ((map), DT_REL, DT_RELSZ, 0); \
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if ((map)->l_info[DT_PLTREL] && \
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(map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL) \
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elf_dynamic_do_rel ((map), DT_JMPREL, DT_PLTRELSZ, (lazy));
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#else
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#define ELF_DYNAMIC_DO_REL(map, lazy) /* Nothing to do. */
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#endif
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#if ! ELF_MACHINE_NO_RELA
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#define DO_RELA
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#include "do-rel.h"
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#define ELF_DYNAMIC_DO_RELA(map, lazy) \
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if ((map)->l_info[DT_RELA]) \
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elf_dynamic_do_rela ((map), DT_RELA, DT_RELASZ, 0); \
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if ((map)->l_info[DT_PLTREL] && \
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(map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA) \
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elf_dynamic_do_rela ((map), DT_JMPREL, DT_PLTRELSZ, (lazy));
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#else
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#define ELF_DYNAMIC_DO_RELA(map, lazy) /* Nothing to do. */
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#endif
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/* This can't just be an inline function because GCC is too dumb
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to inline functions containing inlines themselves. */
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#define ELF_DYNAMIC_RELOCATE(map, lazy) \
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do { ELF_DYNAMIC_DO_REL ((map), (lazy)); \
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ELF_DYNAMIC_DO_RELA ((map), (lazy)); } while (0)
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#endif
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